20.500.12556/RUL-156264 Wet torrefaction of biomass waste into levulinic acid and high-quality hydrochar using H-beta zeolite catalyst Wet torrefaction (WT) is an effective pretreatment method of biomass waste for producing high-quality hydrochar and valuable liquid products. This study delves into how acid catalysts and reaction conditions in WT impact the resulting hydrochar’s surface characteristics and elemental composition, as well as the distribution of liquid products. The focus is on utilizing wood cellulose pulp residue (WCPR) as the feedstock with H-Beta zeolite catalyst in a nitrogen-rich environment. The WT process involves a temperature range of 180–260 °C, and reaction durations spanning 15–60 min. The findings reveal that WT conditions, including the catalyst for WCPR, significantly influence the hydrochar’s properties and liquid product distribution. With increasing temperature and reaction time, the hydrochar experiences changes, including increased carbon content and reduced oxygen content. The study identifies 260 °C and 30 min as the optimal temperature and time for levulinic acid production, achieving a remarkable selectivity of 62.8% with the H-Beta zeolite catalyst using H$_2$O/WCPR = 10. Various properties of the resulting hydrochar are assessed, including higher heating values (HHVs), decarbonization (DC), dehydrogenation (DH), deoxygenation (DO), enhancement factor, carbon enrichment, surface area, pore diameter, weight loss as well as solid, carbon, hydrogen, and energy yields. The WT + Beta_220 sample, processed at 220 °C for 30 min, exhibited the highest HHV at 30.3 MJ/kg and carbon content at 78.9% in hydrochar compared to various biomass types, with an enhancement factor of 1.51 and carbon enrichment of 1.63, while the sequence of element removal during WT prioritized as DO > DH > DC. Furthermore, it is worth highlighting that the most significant weight loss, increasing from 17.0 to 60.7%, was observed under the same WT conditions. Lastly, a comprehensive reaction pathway is proposed to elucidate the WT of WCPR with the presence of H-Beta zeolite catalyst under these optimized conditions. biomass waste cellulose hydrochar levulinic acid wet torrefaction biokemija biomasa odpadna biomasa celuloza levulinska kislina true false true Angleški jezik Slovenski jezik Članek v reviji 2024-05-16 13:36:11 2024-05-16 13:36:12 2024-05-17 04:10:17 0000-00-00 00:00:00 2024 0 0 16 str. art. 141735 Vol. 449 10 Apr. 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 577 1879-1786 10.1016/j.jclepro.2024.141735 189812227 1-s2.0-S0959652624011831-main.pdf 1-s2.0-S0959652624011831-main.pdf 1 2DA7DBF77624E8E0081A96742857CEA7 b0e016ebfdcdbaab61ec370172a12e4326c59aa9fe72bd2d137b4a116ebaea91 a281390d-137a-11ef-bd09-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=183631 https://www.sciencedirect.com/science/article/pii/S0959652624011831 1 7f3143a2-1378-11ef-bd09-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=183628 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0